How to add a third-party card to the emulator on windows phone 7.1?

Question

Google Maps

Hello, I am writing an application on windows phone 7.1, but the problem is I can’t add a map, for example, gas stations. I tried the built-in map through bing in windows phone, it turns out I even registered to get the developer keys, I ate the keys in XAML. But I can’t add another card so that it is displayed in the phone emulator. I write the application under the name of gas station gas stations, but I can’t add a map with an address so that it is displayed, please help. Thanks